| Year | Value | | 2024 | 394,828 | | 2023 | 384,154 | | 2022 | 374,448 | | 2021 | 361,569 | | 2020 | 343,464 | | 2019 | 328,070 | | 2018 | 318,101 | | 2017 | 314,994 | | 2016 | 324,674 | | 2015 | 343,319 | | 2014 | 365,941 | | 2013 | 394,906 | | 2012 | 427,835 | | 2011 | 458,214 | | 2010 | 484,351 | | 2009 | 504,960 | | 2008 | 517,079 | | 2007 | 521,880 | | 2006 | 524,850 | | 2005 | 530,673 | | 2004 | 540,277 | | 2003 | 550,239 | | 2002 | 552,836 | | 2001 | 543,027 | | 2000 | 521,367 | | 1999 | 490,903 | | 1998 | 456,203 | | 1997 | 423,378 | | 1996 | 396,893 | | 1995 | 378,232 | | 1994 | 367,155 | | 1993 | 361,180 | | 1992 | 358,318 | | 1991 | 357,540 | | 1990 | 356,873 | | 1989 | 355,263 | | 1988 | 352,378 | | 1987 | 348,031 | | 1986 | 342,503 | | 1985 | 336,347 | | 1984 | 330,050 | | 1983 | 324,134 | | 1982 | 318,940 | | 1981 | 314,330 | | 1980 | 309,921 | | 1979 | 305,228 | | 1978 | 300,017 | | 1977 | 294,384 | | 1976 | 288,435 | | 1975 | 282,496 |
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